The element antimony has an atomic number of 51, and a chemical symbol of 'Sb', to honor its known origins in the ancient, classical Latin and earlier, ancient, classical Greek languages. For its equivalents are the Latin 'Stibium', and the Greek 'Stimmi' and 'Stibi'. Most likely, an even earlier form started out as a loan word from Arabic or Egyptian. For the word existed in the even more ancient Egyptian language as 'msdmt'. Either way, the Latin 'Stibium' carried the meaning of mark. For it was used for dyeing the eyebrows, and as an eye-salve, by the ancient Romans.